The old school crowd wouldn’t be expecting much from WotC on Greyhawk - they don’t want changes to the setting by and large, and if they still use the setting, it’s probably with one of the OSR rule sets or an older version of D&D. But WotC likes to mine its history and re-spin it for players who don’t have that same sense of history, so Greyhawk is viable. It’s been years since they’ve touched it but there are so many characters and adventures set there that I can see them slicing off part of it and focusing a few adventures there. They updated Bigby, Tasha, Mordenkainen. WotC also doesn’t seem to really be concerned about whether older fans like what they do with settings. Dragonlance, Spelljammer and Planescape all saw new stuff but I don’t hear anyone say it really resonated for them. I think the only setting that got an update where I truly heard a number of people thumbs up the changes was Ravenloft, and even then there was a vocal minority who weren’t happy because it changed their canon.